The Pht1;9 and Pht1;8 transporters mediate inorganic phosphate acquisition by the Arabidopsis thaliana root during phosphorus starvation.

The New Phytologist
Estelle RemyPaula Duque

Abstract

• The activation of high-affinity root transport systems is the best-conserved strategy employed by plants to cope with low inorganic phosphate (Pi) availability, a role traditionally assigned to Pi transporters of the Pht1 family, whose respective contributions to Pi acquisition remain unclear. • To characterize the Arabidopsis thaliana Pht1;9 transporter, we combined heterologous functional expression in yeast with expression/subcellular localization studies and reverse genetics approaches in planta. Double Pht1;9/Pht1;8 silencing lines were also generated to gain insight into the role of the closest Pht1;9 homolog. • Pht1;9 encodes a functional plasma membrane-localized transporter that mediates high-affinity Pi/H⁺ symport activity in yeast and is highly induced in Pi-starved Arabidopsis roots. Null pht1;9 alleles exhibit exacerbated responses to prolonged Pi limitation and enhanced tolerance to arsenate exposure, whereas Pht1;9 overexpression induces the opposite phenotypes. Strikingly, Pht1;9/Pht1;8 silencing lines display more pronounced defects than the pht1;9 mutants. • Pi and arsenic plant content analyses confirmed a role of Pht1;9 in Pi acquisition during Pi starvation and arsenate uptake at the root-soil interface. ...Continue Reading

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Citations

Mar 4, 2014·Annual Review of Plant Biology·Damar Lizbeth López-ArredondoLuis Herrera-Estrella
Oct 12, 2015·Plant & Cell Physiology·Nannan LiWon-Yong Song
Jul 9, 2014·Trends in Plant Science·Tzu-Yin LiuTzyy-Jen Chiou
Dec 19, 2013·Plant, Cell & Environment·Xiaofei WangPing Wu
Aug 11, 2015·Plant Science : an International Journal of Experimental Plant Biology·Lei WangZhi Min Yang
Feb 24, 2015·The Plant Journal : for Cell and Molecular Biology·Fang ZhangShubin Sun
May 7, 2015·Journal of Experimental Botany·Alison BakerStephen A Baldwin
Aug 31, 2016·Frontiers in Plant Science·Ewa Młodzińska, Magdalena Zboińska
Jan 6, 2018·International Journal of Environmental Research and Public Health·Ghulam AbbasUNKNOWN Natasha
Sep 11, 2018·Plant, Cell & Environment·Vijay KumarKarl-Josef Dietz
Sep 18, 2015·F1000Research·Damar López-ArredondoLuis Herrera
Apr 26, 2019·International Journal of Phytoremediation·Sylwia BudzyńskaMirosław Mleczek
May 3, 2013·Nature·Julian I SchroederDale Sanders
Jul 4, 2018·International Journal of Molecular Sciences·Sudhakar SrivastavaLam-Son Phan Tran

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